Pump.



D. W. BLAIR.

PUMP.

APPLICATION r1151) SEPT. 13, 1910.

Patented Sept. 5, 1916.

2 $HEETSSHEET I.

WITNESSES f ATTORNEY D. W. BLAIR 1.:lt011tmlhupt. 5, 1916.

2 SHEETS SHEET 2 WITNESS/f5 ATTORNEY navm w. imam, or New Your, 11

PUMP.

Specification of Letters Intent Patented'S eplt. 1916.

Application filed September 18,1910. Serial No. 581,848.

To all whom it may concern ZBe it known that 1, DAVID Bmm, a citizen ofthe United States,and a resident of the city, county, and State of NewYork, liavelinvented a certain new and usef provementzin- Pumps, ofwhich the followa specification; v

and especially to theclass of pumps, inm tended for pumping acids oracid solutions. Oneof the objects ofthe invention is to provide apumpiwhich will have a very high j eificiency and w'hose parts are socombined. y that theymay lie most readily and easily I the shaft 16 andare held in their-spaced relation thereon by providingonewith anoutassembled andidisassembledf afteridescription. Y 7 fiiIn theaccompanying drawings: Figure l is avertical section of a pump embodyingthepresent improtrements. Fig. 2 is a hor1- :z ontal-secticn' on thisline 22 of,Fig. l.

' Fig. 3, is a detail" t'iew of the impellers and a portion of'theixlshaft. Fig.4 is a detail viewof the division and cover .plates.

The same characters of reference designate the same parts in the severalviews.

. ."A designates a suitable framework which be .of any suitable shape,size, material .an 5 construction. :bodies abuse 11 and a superstructure12 which latter has a space 13 within which the pump casing B, is,mounted, and a separate [space- 14 which receivesnthe pulley 15 by whichthe pump is driveri' from any suitable a source of power. The pumpcasing B is of any suitable eonstruction and as already-stated it ismounted in the space 13 and is supported from the base 11.

a The impeller shaft 16 is suspended from its bearings 17 and 18 in theframe and extends into 'the impeller chamber 20 of the pump casing13,130 or nearly to the bottom of the latter. Upon it are mounted twoimpellers G and D, which are spaced apart thereon and are arrangedbetween the suction inlet 21 and the outlet 22 with which the casingwis'provided. a The casing referred to is preferably formed to provide atank or vat 23 having the suction inlet 21 and an overflow 24 near itsopposite ends, respectively, and its wall rpbelow saidtank or vat isformed to provide annular channels 25 and 26 which are cm {I operativelymlated to the impellers, as will be more clearly understood from thehereinullm is invention relates to rotary pumps, .1

Otl ier objects will appear from the heroin- As here shown it emafterdescription. The .outlet port 22'is connected to the channel,26.

' Between the tank or vat 23 andjthe impeller receiving portionoftheicasing, the 60 atter is formed to provide=a step bearing, havinginwardly-inclined'walls 27 and 28 and an intermediate platform 29. Belowthisit= is formed withaIsecond bearing 30 with similarly, inclinedwalls31 and 32, and 65 below the, latter it has a thirdbearing 33 withan inwardly inclinedwall 34. Its lateral walls are formed to provideopenings or orts 35, '36 and 37. I

he impellers C and D are-mounted on 7 wardlyextending and the othervwith an inwardly extending me1nber.-'a s 40{and 41 reof them isseatedagainst the shoulder of the other. The inner impeller C has its hub 43mounted against'a nut Men the end of said shaft, whereby it is held'against inward g movement on the shaft. Each of these impellerscomprises an inner wall 45jand an outer wall 46, the latterpreferablyinclined outward from the shaft and having an opening 47around its hub for the'inlet of liquid to the space 48 between saidwalls. Curved vanes or wings 49 radiating from the hub, are disposed insaid space 48- and-serve by their centrifugal action to throw the liquidout from the impeller through the open pe- 90 riphery of the latter andinto the adjacent channel in the pump casing. 1

A hollow division plate E is mounted in the space between the twoimpellers, This division plate E is composed of inner and outer members50 and 51 Which are mounted on the seats or bearings 30 and 33,respectively and are connected with each other by lugs or webs 52, whih; are spaced apart to provide openings 53 o register with the ports 36and thus serve as a means by which the interior of the division platehas communication with the channel 25 The interior of thisdivision-plate also has communication with the interior of the impellerC' by means of an opening 54 in its lower wall, which registers with theopening 47 in the outer wall of said impeller.

A covering plate F, having a peripheral fiange 55 at its outer-edgeseated upon the 110 platform 29 is mounted in the openingflea'ding tothe impeller chambers-2030f the pump casing, and isvprovi'ded with anopening 56 of'tlie upper impeller. i -Thisefbvering plate has"'i nwardly extending lugs 57 which, as most clearly shown in Fig. 4 areseated on which registers with the .,in let opening t7 the outer member50 of the division plate,

35 in said. casing-- It will be noted that the impellers andthe'flatter;

These lugs 57 are arranged to provide openings 58 by which the interiorof the impeller D has communication with the channel '25 of the. pump.casing tl n gh the inlet ports body ofthe' coverplate and the inner wallof the division plate are eaeh'shown as 7 being concave toconform t0 theillustrated convex 'su'r'fa'ces of the 'impellers'pres'entedthereto,respectively, and that said coverand division plates are fixed withrelation to the are free froin'cont act with Theparts are removablysecured in opera tive relation by'means of rods 60 whose lower ends are.seated in sockets 61 withwhich the pouter surface of the covering plateis pr0- vided, while their upper ends 62am pointed .and'seated inholding devices-63jadjustably secured 'to' the web Orwell lZ'of theframe.

These holding devices are shown as screws. whose heads greiprovidedwitlr 'seats'fii for. the pointed ends of the rods,- the shanksofsaidscrews being' mounted in thread-ed Qapert'u'res 65 insaid Wall; having alength :suclrasto prowde a clearance-space (36 when thefscrews areengaged with. the rods, this clearance space, zidaptrng thescrew to bemoved out of engagement withithe rod;

It fwill be noted'that whenfthe parts are assin'bledinthefpositi'onsdescribed acid or other liquid to' be pumped,"which may be*poured into the tanlcfor vat 2-3 or find its j-wayj thereto -throughthe suction inlet 21, will-be drawnby the-impeller D and forced out intothe channel 25 and. thence, by the eombined'pressureiof the impeller'Dand the suction the impeller C, will be drawn through the port 36 intodivision plate E and thence'into the impeller by which it will be forcedout'into the channel 26 and finally through the outlet As a result ofthis-combination of parts a pump is pro 50':

high power. It will also be noted'tl'iat the parts maybe Very readilyassembled and duced which is capable of developing very when assembledare securely held in their proper positions. It should be here statedthat the described bore-ling of the walls ad- I jacent to the seatsforthe cover plate F and the co rresponding tid plates, wh ch pellerj'the impeller Dis next forced until its hub engages the hub of theimpeller C; and after this has beenvdone the cover plate F is forcedtoits seat and is secured by the holding rod and holding devices (5-3. indisassembling the parts the l'iolding' devices 63am adjusted into theirsockets until the rods'60 are freed and. when this has been done theparts can be readily removed for cleaning purposes, renewal or repairor: for

any other purpose.

vision is madeffor renderingflthein acid proof. The-cover anddivisionj-p lates and.-

the impellers, and their parts which come in contact w th the acid alsoare suitably made proof against 'the sauie by forming;

them of. lead' orother'aciil-proof material or by lining them ith *anacid-proof "material This is also 'trueof 'course of the pumpcasi'ng;

' Attention is calledtothe fact that in the illustrated embodiment ofthe invention-the impellers are shown as being free from contact withthe cover anddivision platesand In order to enable the parts of the pumpwhich are in contact with acid or with acid. solution, to resisttheaetion 'thereof, when .the pump is employed for such material, the iimpeller shaft 16 and the rods (:01are lined: with acid proof material,as indicated at T0; and 71 respectively, or othcr: suitable proalso withthe pump casing". They therefore operate without friction... In fact itwill be noted that there are nomoving-parts in con-' tact withstationary, parts. within the pump.

Hence heating due tofrictional ,contact'lie tween stationary andfmoringparts isfieri acid, .as will be" readily understood It is believedthat-the construction; opera ti'on and advantages'o-fa the inventionwill Itirely overcome. Thisis anfadvantageparticularly when the liquidbeing pumped 15 an;

be clearlycomprehemled from the foregoin a 0 b description and it shouldbe noted that the invention in its broader aspectii is not restrict-edto the (lQtflllSfi'llllStlfitCd and may be varied with respectto such details witbout departing from its spirit or the scope of thesubjoined claims. V

. Ilrving thus described the invention what is believed lzo'hc. new anddesired to be secured by letters-Patent, is:

a l. In a frot by piimp, a casing 'having' spaced passages, one of thepassages being provided with spaced-inlet andoutlet ports,

the wall of the-casing having a seat between 1 said ports, the otherpassage having a. port, the casing having a seat between the latter portand the-outletport 0f,;,'the first mentioncd passage, a'division platemounted'on said seats and? internally having communication with thefirst mentioned passage through the outlet port of the same, animpeller-chamber above and division plate, an

impeller chamber belo said diyision plate,

an impeller mounted in each of said chambers, one of said impellershaving communi-- cation With the first mentioned passage through theinlet port of the same and the other impeller having communication withthe other passage through the port to the same, the last mentionedimpeller and the division plate having communication with each other,and the casing having a liquid inlet to the first impeller and a. liquidoutlet from the second mentioned passage.

2. In a rotary pump, a casing having spaced passages, one ofthejpassages being provided with spaced inle tand outlet ports, the wallof the casing havmg aseat between said ports, the otherpassag ha'ving aport, a casing having a seat between the latter port and the outlet portoi the first mentioned passage, a division plate mounted on said seatsand internally having 00111111 11 1: cation with the first mentionedpasage through the outlet port oflfthe same, the wall of the casingabove the division plate resting on said seat, an impeller chamberbetweenr-nid division plate and said cover plate, an impeller chamberbetween said division plate and an end of the casing, an impellermounted in each chamber, one of said impellers having communication withthe first mentioned passage through the inlet port to the latter, andthe other impeller having conununication with the other, as sage throughthe port to the same, the ast mentioned impeller and the division platehaving coinm'uuieation with each other, and the rover plate having anaperture leading to the first mentioned impeller.

3, In a rotary pump, a casingprovided with a well in; the, upper partthereof and having an inlet communicating with said well, said casingprovided with spaced pas;

; Sag below the welha hollow division plate 1 mounted between saidpassages and having an. i'nlet and an outlet, a'cover plate mount- T edbetween the well and the division plate and forming with the divisionplate an impeller chamber, a second impeller chamber being formedbetween the division plate and he bottom of the casing, the cover platenavin an o enin between said assafies and. having an inlet and anoutlet, :1. cover plate mounted between the ellv and the llVlSlOIl plateand formmg with the division plate an impeller chamber, a secondimpeller chamber being formed between the division plate and. the bottomof the casing, the cover plate having an opening pommunicating with oneof saidimpeller chambers, the said rhainrmr having an outletcommunicating with one of sai passages, the other chamber having aninlet communicating with the hollow division plate and an outletcommunice ling with the secondv pamage, a shaft, a l 'tv of impellersmounted on said shaft that in said chambers, one of said impellers beingdisposed in operative relation with the a cover plate seated on thecasing and arranged between the well and the portion of the casingcontaining said passages, said cover plate having an opening throughwhich the well has communication with the latter portion of the casing,the well having an inlet, one of said passages havin an inlet port andan outlet port, the wall 0% the casing. having a seat between saidports, the

other of said passages having an inlet port and the Wall having a seatadjacent thereto, a hollow division plate mounted on said seats andhaving an inlet opening in communication with the outlet port of thefirstmentioned passage, the division plate also having an outletopening, an impeller shaft,

and impellers mounted on said shaft and arranged on opposite sides ofthe division plate, one of said impellers being in operative relationwith the opening of the cover plate and the inlet port to thefirst-mentioned passage and the other of said impellers being inoperative relation with the outlet openingof the division plate and theinlet port to the second-mentioned passage, the-latter passage havingmeans for the egress of liquid therefromL '5.' In a rotary pump, acasing having a well in the upper part thereof, said well being providedwith means for the ingress of liquid thereto and aplurality ofimpellerchambers formed in the casing below said well, the casingbeingprovided with a removable cover plate separate from the shaft supportbetween said well and chambers, said cover" plate partially closing theen trance to the chambers, and impeller-shaft, and a plurality of spacedinpellersmounted on said shaft and in said chambers; the casing alsohaving means for the egress of liquid from said chambers.

6. In a rotary pump, a casing having a well in the upper part thereof,said well be' ing provided with means for the ingress of liquid theretoand a plurality of im'pellerchambers formed in the casing below saidvwell, the casing being provided with a cover I plate removably seatedbetween said well and chambers, said cover plate partially closing theentrance, tothe chambers and constructed and arranged for. renio-valwholly sep rate from the operating shift,

a division plate removabh seated on the wall of the asing and arrangedbetween said chambe s, an impeller shaft, and a plurality of spacedimpellers mounted on said shaft and in said chambers; the casing also"having means for the egress of liquid from said chambers.

7. In a rotary pump, a casing provided with spaced seats, a cover plateremovably mounted-upon one of the seats, a division plate ljtrnovablymounted on the other of the seats, an impeller arranged between saidplates, a second impeller arranged inward of the division plate, animpeller shaft extending through said plates and impellers, and carryingthe latter, the cover plate having projections engaging the divisionplate, and means engaging the cover plate for holding both plates inposition.

8. In a rotary pump, a casing provided with spaced seats, a cover plateremovably mounted upon one of the seats, a division plate removablymounted on the other of the seats, an impeller arranged between saidplates, a second impeller arranged inward of the division plate, animpeller shaft extending through said plates and impellers, and carryingthe latter, the cover plate having projections engaging the divisionplate, and means engaging the cover plate for holding both plates inposition, said means comprising rods and adjustable holding devices forthe rods.

9. In a rotary pump, a casing having inner and outer passages, the outerpassage provided with inlet and outlet ports, the inner passage havingcommunication with the pump outlet, a hollow division plate locatedwithin the casing between said passages, the said division plate and thebottom of the casing being separated to form an inner impeller chamber,a removable cover plate independent of the shaft support within thecasing and separated from the division plate to form an outer impellerchamber, an impeller in the first mentioned chamber and operativelyrelated to the inner passage to force liquid thereinto, the divisionplate adapted to conduct liquil from the outlet port of'tlie outerpassage to the impeller, a second impeller in the outer chamber arranged to force liquid into the outer passage, and an opening in thecover plate leading to said second mentioned impeller, a shaft uponwhich the impellers are mounted. to operate and a support for saidshaft.

10. In a rotary pump, a casing having a passage therein, said passagebeing provided with an entrance, separately formed plates consisting ofa covering plate and a division plate removably mounted in said casingat the opposite sides of the entrance to said passage, an impellermounted in the space between said plates, holding rods engaging theouter covering plate, and adjustable holding devices for sald rods.

11. In a rotary pump, a casing provided with passages, the wall of saidcasing being provided with an aperture which communicates with one ofsaid. passages and beveled and provided with seats on opposite sides ofsaid aperture, a hollow division plate removably mounted on said seatsand having an aperture registering with the aperture of said wall, animpeller above said division plate, and an impeller below said divisionplaie adapted to force liquid into said pa .-.ages respectively, thesaid division plate having direct communication with one of saidimpellers.

12. In a rotary pump, a casing provided with inner and outer passages,the wall of said casing being'oeveled and provided with seats, inner andouter spaced impellers arranged in said casing and disposed in suchrelation to the passages as to force liquid into the same, respectively,a removable cover plate seated within said casing and having a beveledwall engaging the beveled wall of the latter, said plate having an. openperiphery communi. tating with the outer passage, a removable hollowdivision. plate, seated in said chamber and having a beveled wallengaging the beveled wall of the latter; said division plate having anopen periphery communicating with the outer passage, the internal spaceof said division platen also having communication with the innerimpeller, holding rods engaging the cover plate and adjustable holdingdevices for said rods.

In witness whereof I have hereunto set my hand at the city, county, andState of New York, this 31st day of August, 1910.

DAVID IV. BLAIR.

In presence of FRANK E'ornnnm, J oiIN J. RANAGAN.

